Class 7 Heat CBSE Questions & Answers

Class 7 · Heat

This is Science Class 7 Heat CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
The bottom of stainless steel pan have copper because
  • A
    Copper is more durable
  • B
    Copper is better conductor
    Correct
  • C
    Copper is easier to clean.
  • D
    Copper is more attractive
2
Heat is a form
  • A
    Power
  • B
    Work
  • C
    Temperature
  • D
    Energy
    Correct
3
Which of the following is the best conductor of heat?
  • A
    Metals
    Correct
  • B
    Water vapour
  • C
    Alcohol
  • D
    Water
4
10\(^0{\text{C}}\) is equal to
  • A
    173 K
  • B
    283 K
    Correct
  • C
    183 K
  • D
    273 K
5
Which type of cloth is preferred in summer?
  • A
    Silk clothes
  • B
    Cotton clothes
    Correct
  • C
    Polyester clothes
  • D
    Nylon clothes
6
Land breeze blows from
  • A
    Lower surface to upper surface
  • B
    Sea to land
  • C
    Upper surface to surface layer
  • D
    Land to sea
    Correct
7
In conduction
  • A
    Molecules are not required
  • B
    Molecules are away from each other
  • C
    Molecules are in contact of each other
    Correct
  • D
    Can take place in air
8
Liquid used in thermometer is
  • A
    Alcohol
  • B
    Mercury
    Correct
  • C
    Water
  • D
    Sprit
9
25\(^0{\text{C}}\) is equal to
  • A
    398 K
  • B
    498 K
  • C
    298 K
    Correct
  • D
    198 K
10
Liquid and gas transfer the heat by
  • A
    Radiation
  • B
    Conduction
  • C
    All of these
  • D
    Convection
    Correct
11
Metals are ___________ conductor of heat.
  • A
    Some are good
  • B
    Poor
  • C
    Good
    Correct
  • D
    Some are poor conductor
12
Woollen clothes
  • A
    Keep us cool
  • B
    Decrease the body temperature
  • C
    Increase the body temperature
  • D
    Keep us warm
    Correct
13
Degree of hotness or coldness is called
  • A
    Temperature
    Correct
  • B
    Power
  • C
    Heat
  • D
    Energy
14
Sun’s light reaches to earth surface through
  • A
    Convection
  • B
    Radiation
    Correct
  • C
    Conduction
  • D
    Radio wave
15
Boiling point of pure water is
  • A
    100\(^0{\text{C}}\)
    Correct
  • B
    80\(^0{\text{C}}\)
  • C
    110\(^0{\text{C}}\)
  • D
    80\(^0{\text{C}}\)